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Physics Question Paper
Physics
Course:
Secondary Level
Institution:
Mock question papers
Exam Year:
2012
NJABINI BOYS HIGH SCHOOL
DISTRICT JOINT KCSE MOCK 2012
DATE:12/7/2012
TIME:2HRS 30MIN
INSTRUCTIONS TO CANDIDATE.
1. Read question carefully and answer only what is asked.
2.All questions are compulsory.
3.Wrong numbering will lead to 10% deduction of total marks scored.
4.Answer all questions in answer booklet.
Q.1.Explain how a steel needle is made to float on water. (4 marks)
Q.2.Explain how capillary rise or fall in a thin tubes occurs. (2 marks)
Q.3.State two conditions necessary for a rigid body to be in equilibrium. (2 marks)7
Q.4.State Hooke's law and explain the term elastic limit.(5 marks)
Q.5.Explain the terms scalars and vector quantities. (4 marks)
Q.6.State two ways of reducing surface tension in water. (2 marks)
Q.7.A candle is lit and placed on a level bench.
State and explain the changes in the stability of the candle as it continues to burn. (5 marks)
Q.8.Two springs of negligible weights and of constants k1=50N m and K2=100N m respectively are connected end to end and suspended from a fixed point.
Determine:
(a) The total extension when a mass of 2.0kg is hung from the lower end. (5 marks)
(b)The constant of the combination. (5 marks)
Q.9. A book has 100 sheets bound between two covers.Given that each leaf is 0.10mm thick and each cover is 0.20mm thick.
Determine the thickness of the book.
(5 marks)
Q.10.A box has a 6cm square base and contains water to height of 7cm.
(a) When a stone is lowered into the water so as to be completely immersed,the water rises to a height of 9cm.
What is volume of the stone? (5 marks)
(b) What is the density of the stone given that its mass is 200g ? (5 marks)
Q.11.The level of water in a burette is 25cm.
Fifty spherical balls each of radius 4mm are immersed in the water.Determine the new reading of the burette. (5 marks)
Q.12. A tin containing 5000cm3 of paint has mass of 7.0kg.
(a) If the mass of the empty tin,including the lid,is 0.5kg,calculate the density of the paint (4 marks)
(b)The tin is made of a metal which has a density of 7800kg m.
Determine the volume of metal used to make tin and the lid. (6 marks)
Q.13.A drop of oil of volume 0.006cm3 forms a patch of diameter 35cm on a water surface. Calculate the diameter of a molecule of oil. (5 marks)
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